Roller end cap



FIG. 1 is a perspective view of a roller end cap showing our new design;

FIG. 2 is a back side view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a bottom side view thereof;

FIG. 5 is a top side view thereof; and,

FIG. 6 is a perspective view of the end cap thereof with a roller.

The broken lines illustrate portions of a roller end cap that form no part of the claimed design. 

CLAIM The ornamental design for a roller end cap, as shown and described. 